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200 papers

We probe the motion of a 6 $\mu g$ magnetically levitated superconducting microsphere using optical interferometry at 3 K, achieving a resolution better than 1 $nm/ \sqrt{Hz}$, and use the measured signal to feedback-cool its motion. The…

No transient electromagnetic emission has yet been found in association to fast radio bursts (FRBs), the only possible exception (3sigma confidence) being the putative gamma-ray signal detected in Swift/BAT data in the energy band 15-150…

High Energy Astrophysical Phenomena · Physics 2019-09-11 C. Guidorzi , M. Marongiu , R. Martone , L. Amati , F. Frontera , L. Nicastro , M. Orlandini , R. Margutti , E. Virgilli

NRAO Very Long Baseline Array (VLBA) observations of NGC 4278, NGC 4374 (M84), NGC 6166, and M87 (NGC 4486) have been made at 43 GHz in an effort to image the jet collimation region. This is the first attempt to image the first three…

Astrophysics · Physics 2009-11-10 C. Ly , R. C. Walker , J. M. Wrobel

(abridged) Very long baseline interferometry (VLBI) observations at 86$\,$GHz (wavelength, $\lambda = 3\,$mm) reach a resolution of about 50 $\mu$as, probing the collimation and acceleration regions of relativistic outflows in active…

The CALICE collaboration is studying the design of high performance electromagnetic and hadronic calorimeters for future International Linear Collider detectors. For the electromagnetic calorimeter, the current baseline choice is a high…

Instrumentation and Detectors · Physics 2009-09-29 CALICE Collaboration , J. Repond , J. Yu , C. M. Hawkes , Y. Mikami , O. Miller , N. K. Watson , J. A. Wilson , G. Mavromanolakis , M. A. Thomson , D. R. Ward , W. Yan , F. Badaud , D. Boumediene , C. Carloganu , R. Cornat , P. Gay , Ph. Gris , S. Manen , F. Morisseau , L. Royer , G. C. Blazey , D. Chakraborty , A. Dyshkant , K. Francis , D. Hedin , G. Lima , V. Zutshi , J. -Y. Hostachy , L. Morin , E. Garutti , V. Korbel , F. Sefkow , M. Groll , G. Kim , D-W. Kim , K. Lee , S. Lee , K. Kawagoe , Y. Tamura , D. A. Bowerman , P. D. Dauncey , A. -M. Magnan , C. Noronha , H. Yilmaz , O. Zorba , V. Bartsch , J. M. Butterworth , M. Postranecky , M. Warren , M. Wing , M. Faucci Giannelli , M. G. Green , F. Salvatore , T. Wu , D. Bailey , R. J. Barlow , M. Kelly , S. Snow , R. J. Thompson , M. Danilov , V. Kochetkov , N. Baranova , P. Ermolov , D. Karmanov , M. Korolev , M. Merkin , A. Voronin , B. Bouquet , S. Callier , F. Dulucq , J. Fleury , H. Li , G. Martin-Chassard , F. Richard , Ch. de la Taille , R. Poeschl , L. Raux , M. Ruan , N. Seguin-Moreau , F. Wicek , Z. Zhang , M. Anduze , V. Boudry , J-C. Brient , C. Clerc , G. Gaycken , C. Jauffret , A. Karar , P. Mora de Freitas , G. Musat , M. Reinhard , A. Rouge , A. L. Sanchez , J-Ch. Vanel , H. Videau , J. Zacek , J. Cvach , P. Gallus , M. Havranek , M. Janata , M. Marcisovsky , I. Polak , J. Popule , L. Tomasek , M. Tomasek , P. Ruzicka , P. Sicho , J. Smolik , V. Vrba , J. Zalesak , Yu. Arestov , A. Baird , R. N. Halsall , S. W. Nam , I. H. Park , J. Yang

We obtain constraints on non-Newtonian gravity following from the improved precision measurement of the Casimir force by means of atomic force microscope. The hypothetical force is calculated in experimental configuration (a sphere above a…

High Energy Physics - Phenomenology · Physics 2008-11-26 M. Bordag , B. Geyer , G. L. Klimchitskaya , V. M. Mostepanenko

We report the detection of a single burst from the first-discovered repeating Fast Radio Burst source, FRB 121102, with CHIME/FRB, which operates in the frequency band 400-800 MHz. The detected burst occurred on 2018 November 19 and its…

We introduce wavefront shaping as a tool for optimizing the sensitivity in nano-optomechanical measurement schemes. We perform multimode output analysis of an optomechanical system consisting of a focused laser beam coupled to the…

We report on a search for non-Newtonian forces that couple to mass, with a characteristic scale of ${\sim}10~\mu$m, using an optically levitated microsphere as a precision force sensor. A silica microsphere trapped in an upward-propagating,…

High Energy Physics - Experiment · Physics 2021-10-27 Charles P. Blakemore , Alexander Fieguth , Akio Kawasaki , Nadav Priel , Denzal Martin , Alexander D. Rider , Qidong Wang , Giorgio Gratta

The reionization of the Universe, it is believed, occurred by the growth of ionized regions (bubbles) in the neutral intergalactic medium (IGM). We study the possibility of detecting these bubbles in radio-interferometric observations of…

Astrophysics · Physics 2009-03-19 Kanan K. Datta , Somnath Bharadwaj , T. Roy Choudhury

Engineering new quantum phases requires fine tuning of the electronic, orbital, spin, and lattice degrees of freedom. To this end, the kagome lattice with flat bands has garnered great attention by hosting various topological and correlated…

Low energy non linear QED effects in vacuum have been predicted since 1936 and have been subject of research for many decades. Two main schemes have been proposed for such a 'first' detection: measurements of ellipticity acquired by a…

Instrumentation and Detectors · Physics 2009-08-05 G. Zavattini , E. Calloni

We introduce the TANAMI program (Tracking Active Galactic Nuclei with Austral Milliarcsecond Interferometry) which is monitoring an initial sample of 43 extragalactic jets located south of -30 degrees declination at 8.4 GHz and 22 GHz since…

A prototype Secondary-electron Emission Monitor (SEM) was installed in the 8 GeV proton transport line for the MiniBooNE experiment at Fermilab. The SEM is a segmented grid made with 5 um Ti foils, intended for use in the 120 GeV NuMI beam…

Instrumentation and Detectors · Physics 2009-04-21 S. Kopp , D. Indurthy , Z. Pavlovich , M. Proga , R. Zwaska , S. Childress , R. Ford , C. Kendziora , T. Kobilarcik , C. Moore , G. Tassotto

We demonstrate the potential of new adaptive optical technology to expand the detection horizon of gravitational-wave observatories. Achieving greater quantum-noise-limited sensitivity to spacetime strain hinges on achieving higher…

We describe the construction and performance of a scintillating fiber detector used in the near detector for the K2K (KEK to Kamioka, KEK E362) long baseline neutrino oscillation experiment. The detector uses 3.7 m long and 0.692 mm…

High Energy Physics - Experiment · Physics 2011-09-16 A. Suzuki , H. Park , K2K collaboration

We report the first observation of off-axis neutrino interactions in the MiniBooNE detector from the NuMI beamline at Fermilab. The MiniBooNE detector is located 745 m from the NuMI production target, at 110 mrad angle ($6.3^{\circ}$) with…

Graphene, a single atomic layer of covalently bonded carbon atoms, has been investigated intensively for optoelectronics and represents a promising candidate for high-speed electronics. Here we present a microwave mixer constructed as an…

We demonstrate the blind interferometric detection and localization of two fast radio bursts (FRBs) with 2- and 25-arcsecond precision on the 400-m baseline between the Canadian Hydrogen Intensity Mapping Experiment (CHIME) and the CHIME…